2001 Chevrolet Express 2500 Questions

All 2001 Chevrolet Express 2500 Questions

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1st the lower 2 speeds stopped now the upper 2 have stopped as well. What's going on? I already changed the speed control relay that is next to the blower & still nothing.
1st the 2 lower speeds went now the 2 upper stopped as well I changed speed control relay under the hood next to the blower but still nothing. What's going on???
The secondary air monitor hasn't completed no codes are present
when try to use my keyless remote nothing happens and the remote is ok, check remtote and its fine
HOW MUCH OIL DOES A 5 LITER V8 CHEVY EXPRESS 25 00 TAKE
I want to replce my front brake pads myself, thus I want to purchace the correct pads.
could a egr valve cause a motorto skip
headlamps will not go out ,switch off truck not running headlamps stay on,have to disconnect from lamp,why
BATTERY LIGHT CAME ON AND OFF BEFORE THE NEW PARTS, BATT. LIGHT STAYS ON NOW NOT CHARGING
2001 Chevy Express Van The brake lights won't work if the head lights are on. If the head light switch is turned the brake lights go out. Why?
I just replace my radiator and checked for leaks. Radiator fine, old transmission lines don't seat all the way into the snap connections at the radiator. there does not seam to be any gasket at the connection points...
Why would only the center brake light work and not the left or right brake lights When the bulbs are good